The High-performance In-Mold Antennas (H-IMA) are designed to be placed at the heart of a device, sealed within to protect against moisture while delivering a strong signal.

H-IMA technology has not yet been optimised for smartphones, meaning that the upcoming Galaxy S5 is unlikely to feature the component, but phablets such as the Galaxy Note devices could potentially include one.

Rumours also suggest that LG is experimenting with the same antenna tech, and could include H-IMA hardware in future tablets and smartphones.

Should the report prove accurate, the Samsung Galaxy Note 4 will take on fellow waterproof devices such as the Sony Xperia Z1 and Xperia Z1 Compact.